1 /* Scheme/Guile language support routines for GDB, the GNU debugger.
3 Copyright (C) 1995, 1996, 2000, 2003, 2005, 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "expression.h"
25 #include "parser-defs.h"
32 #define USE_EXPRSTRING 0
34 static void scm_lreadparen (int);
35 static int scm_skip_ws (void);
36 static void scm_read_token (int, int);
37 static LONGEST
scm_istring2number (char *, int, int);
38 static LONGEST
scm_istr2int (char *, int, int);
39 static void scm_lreadr (int);
42 scm_istr2int (char *str
, int len
, int radix
)
50 return SCM_BOOL_F
; /* zero scm_length */
57 return SCM_BOOL_F
; /* bad if lone `+' or `-' */
92 return SCM_BOOL_F
; /* bad digit for radix */
97 return SCM_BOOL_F
; /* not a digit */
103 return SCM_MAKINUM (inum
);
107 scm_istring2number (char *str
, int len
, int radix
)
111 char ex_p
= 0, rx_p
= 0; /* Only allow 1 exactness and 1 radix prefix */
117 if (*str
== '+' || *str
== '-') /* Catches lone `+' and `-' for speed */
120 while ((len
- i
) >= 2 && str
[i
] == '#' && ++i
)
166 return scm_istr2int (&str
[i
], len
- i
, radix
);
168 return scm_istr2int (&str
[i
], len
- i
, radix
);
174 return scm_istr2flo (&str
[i
], len
- i
, radix
);
182 scm_read_token (int c
, int weird
)
202 case '\0': /* End of line */
244 switch ((c
= *lexptr
++))
251 switch ((c
= *lexptr
++))
272 scm_lreadparen (int skipping
)
276 int c
= scm_skip_ws ();
278 if (')' == c
|| ']' == c
)
282 error ("missing close paren");
283 scm_lreadr (skipping
);
288 scm_lreadr (int skipping
)
303 scm_lreadparen (skipping
);
307 error ("unexpected #\\%c", c
);
311 str
.ptr
= lexptr
- 1;
312 scm_lreadr (skipping
);
315 struct value
*val
= scm_evaluate_string (str
.ptr
, lexptr
- str
.ptr
);
317 if (!is_scmvalue_type (value_type (val
)))
318 error ("quoted scm form yields non-SCM value");
319 svalue
= extract_signed_integer (value_contents (val
),
320 TYPE_LENGTH (value_type (val
)),
321 gdbarch_byte_order (parse_gdbarch
));
322 goto handle_immediate
;
329 scm_lreadr (skipping
);
337 scm_lreadparen (skipping
);
342 goto handle_immediate
;
346 goto handle_immediate
;
362 case '*': /* bitvector */
363 scm_read_token (c
, 0);
366 scm_read_token (c
, 1);
368 case '\\': /* character */
370 scm_read_token (c
, 0);
373 j
= 1; /* here j is the comment nesting depth */
380 error ("unbalanced comment");
384 if ('#' != (c
= *lexptr
++))
390 if ('|' != (c
= *lexptr
++))
401 scm_lreadr (skipping
);
405 while ('\"' != (c
= *lexptr
++))
408 switch (c
= *lexptr
++)
411 error ("non-terminated string literal");
440 str
.ptr
= lexptr
- 1;
441 scm_read_token (c
, 0);
444 svalue
= scm_istring2number (str
.ptr
, lexptr
- str
.ptr
, 10);
445 if (svalue
!= SCM_BOOL_F
)
446 goto handle_immediate
;
452 scm_read_token ('-', 0);
458 str
.ptr
= lexptr
- 1;
459 scm_read_token (c
, 0);
463 str
.length
= lexptr
- str
.ptr
;
464 if (str
.ptr
[0] == '$')
466 write_dollar_variable (str
);
469 write_exp_elt_opcode (OP_NAME
);
470 write_exp_string (str
);
471 write_exp_elt_opcode (OP_NAME
);
478 write_exp_elt_opcode (OP_LONG
);
479 write_exp_elt_type (builtin_scm_type (parse_gdbarch
)->builtin_scm
);
480 write_exp_elt_longcst (svalue
);
481 write_exp_elt_opcode (OP_LONG
);
490 while (*lexptr
== ' ')
493 scm_lreadr (USE_EXPRSTRING
);
495 str
.length
= lexptr
- start
;
497 write_exp_elt_opcode (OP_EXPRSTRING
);
498 write_exp_string (str
);
499 write_exp_elt_opcode (OP_EXPRSTRING
);
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